package edu.xjdx.os.controller;

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import edu.xjdx.os.config.AlipayConfig;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Random;

@Controller
@RequestMapping("/alipay")
public class PaidController {

    @ResponseBody
    @RequestMapping("/pay")
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //获得初始化的AlipayClient
        AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.URL, AlipayConfig.APPID, AlipayConfig.RSA_PRIVATE_KEY, "json", AlipayConfig.CHARSET, AlipayConfig.ALIPAY_PUBLIC_KEY, AlipayConfig.SIGNTYPE);
        //设置请求参数
        AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
        alipayRequest.setReturnUrl(AlipayConfig.return_url);
        alipayRequest.setNotifyUrl(AlipayConfig.notify_url);

        //商户订单号，商户网站订单系统中唯一订单号，必填
        String random=String.valueOf(Math.random()*20000+5);
        String out_trade_no = random;
        //付款金额，必填
        String total_amount = "9999";
        //订单名称，必填
        String subject = "支付宝测试";
        //商品描述，可空
        String body = "商品描述";

        alipayRequest.setBizContent("{\"out_trade_no\":\"" + out_trade_no + "\","
                + "\"total_amount\":\"" + total_amount + "\","
                + "\"subject\":\"" + subject + "\","
                + "\"body\":\"" + body + "\","
                + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");

        //请求
        String result;
        try {
            result = alipayClient.pageExecute(alipayRequest).getBody();
            response.setContentType("text/html;charset=" + AlipayConfig.CHARSET);
            response.getWriter().write(result);//直接将完整的表单html输出到页面
            response.getWriter().flush();
            response.getWriter().close();
        } catch (AlipayApiException e) {
            e.printStackTrace();
            response.getWriter().write("捕获异常出错");
            response.getWriter().flush();
            response.getWriter().close();
        }

    }
    @PostMapping("topay")
    public String toPay(){
        return "/fore/paid";
    }
}